A 2mm diameter spherical ball of unit weight 117.5 KN/`m^3` is dropped in a mass of fluid of viscosity 15 poise and specific gravity 0.95. Find out drag force, skin drag and terminal velocity of ball. [2068-Chaitra ] [8]

Distinguish between pressure and friction drag. Explain with sketches, why airfoil is designed as a streamlined body.

Aerofoil

Streamlined Body

A 2000 kg aircraft is designed to carry a payload of 5000N when cruising at 300 km/hr. The effective wing area is `25 m^…

An aircraft weighing 1000 KN when empty has a wing area of 220 `m^2`. It is to take off at a velocity of 300km/hr and a …

Find the expression for pressure and friction drag. What do you understand by a streamlined body? Give some examples of …

Derive an expression for the forces acting on a submerged body.

Given: Military aircraft with M=8000 kg, lands on 350 km/hr and is slowed by a parachute with `A=10 m^2` area. Find …